1. Department of Radiology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea.
2. Department of Surgery, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea.
3. Department of Oncology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea.
4. Department of Radiology, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea.
5. Department of Radiology, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea.